[GitHub] [hadoop] elek commented on issue #814: HDDS-1518. Use /etc/ozone for configuration inside docker-compose

[GitBox <gi...@apache.org>]

elek commented on issue #814: HDDS-1518. Use /etc/ozone for configuration inside docker-compose 
URL: https://github.com/apache/hadoop/pull/814#issuecomment-491745153
 
 
   Note: we create config files based on name convention: FILENAME_EXT_key=value will be converted to FILENAME.EXT. As CONF is a valid extension name (to generate spark/kafka/zookeeper conf, can't remember exactly which one) HADOOP_CONF_DIR should be excluded.
   
   To test:
   
    * Apply the patch
    * build the conainer with ./build.sh
    * tag it: docker tag apache/hadoop-runner:latest apache/hadoop-runner:jdk11
    * Start any of the compose based environments of ozone
   
   To double check:
   
   ```
   docker diff ozone_scm_1
   C /etc
   C /etc/hadoop
   A /etc/hadoop/log4j.properties.raw
   A /etc/hadoop/log4j2.properties
   A /etc/hadoop/log4j2.properties.raw
   A /etc/hadoop/ozone-site.xml
   A /etc/hadoop/ozone-site.xml.raw
   A /etc/hadoop/hdfs-site.xml
   A /etc/hadoop/hdfs-site.xml.raw
   A /etc/hadoop/log4j.properties
   C /opt
   A /opt/transformation.pyc
   A /data
   C /tmp
   A /tmp/hsperfdata_hadoop
   A /tmp/hsperfdata_hadoop/72
   A /tmp/librocksdbjni3381692124588853026.so
   A /tmp/hadoop-hadoop-scm.pid
   ```
   
   As you can see the etc folder is used for configuration.

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